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Latest update: 21/04/2022 13:45:46


Scraping technology for ultra-precise finishing

We use traditional scraping technology to achieve ultra-precise finishes that cannot be produced by machines.

Based on this scraping technology, we will contribute to the machine tool industry by creating new slide units (sliding surfaces) that go beyond conventional concepts.

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The art of scraper finishing
Scraping is a precision machining method in which a scraper tool is used to scrape very small amounts of a flat surface that has been cut with a shaper or flat grinder, or the inner surface of a bearing that has been finished on a lathe, to finish it to an even higher-precision surface.

This is a completely manual and artisanal process, but it is an indispensable part of finishing surface plates and machine tool sliding surfaces. It is one of the most important operations in finishing and assembly.

The scraping process involves rubbing a reference plane or axis against the workpiece to obtain a bite and then shaving off the high parts. This is why it is also known as grinding.

However, there are also other operations where a scraper is used to add a pattern to the machined surface.

If the straightness, flatness, or parallelism of the machined surface is the only issue, then finishing with a precision grinder is good enough.

On the other hand, scraping not only achieves a surface with accuracy equal to or greater than a grinding finish. It also has the advantage of being able to lubricate the slip surface of a machine tool because of the distribution of small, shallow grooves on the surface.

In the case of finishing with grinding surface plates, grinding with a process called three-piece mating ensures a planar surface with extremely high accuracy even without a precise standard. This is another feature of scraping processing.

Scraping is an ultra-precise finishing method, so it goes without saying that it requires practice and experience.

Even today, when machine tools are highly precise, it is still considered to be difficult to achieve a flatness of 2 micrometers or less. We create such flat surfaces with human technology.